Module: Isono::EventObservable
- Included in:
- EventDelegateContext, Node
- Defined in:
- lib/isono/event_observable.rb
Overview
Add event handling support to the arbitrary class. TODO: make it thread safe.
Defined Under Namespace
Classes: Timeout
Instance Method Summary collapse
- #add_observer(evtype, &blk) ⇒ Object
- #add_observer_once(evtype, timeout = 0, &blk) ⇒ Object
- #fire_event(evtype, *args) ⇒ Object
- #remove_observer(ticket) ⇒ Object
Instance Method Details
#add_observer(evtype, &blk) ⇒ Object
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# File 'lib/isono/event_observable.rb', line 43 def add_observer(evtype, &blk) ticket = Util.gen_id @handlers[ticket] = blk (@tickets[evtype] ||= []) << ticket ticket end |
#add_observer_once(evtype, timeout = 0, &blk) ⇒ Object
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# File 'lib/isono/event_observable.rb', line 50 def add_observer_once(evtype, timeout=0, &blk) ticket = add_observer(evtype) { |*args| begin blk.call(*args) ensure remove_observer(ticket) end } if timeout > 0 EM.add_timer(timeout) { if @handlers.has_key? ticket blk.call(Timeout.new) remove_observer(ticket) end } end ticket end |
#fire_event(evtype, *args) ⇒ Object
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# File 'lib/isono/event_observable.rb', line 10 def fire_event(evtype, *args) if logger && @debug_event logger.debug("fire_event(#{evtype}, #{args.nil? ? 'nil' : args.inspect})") end begin on_event_fired(evtype, *args) rescue => e if logger logger.error(e) else puts e end end return unless @tickets[evtype] deleted_tickets = [] @tickets[evtype].each { |ticket| h = @handlers[ticket] if h begin h.call(*args) rescue Exception => e logger.error("caught exception: #{ticket}, proc=#{h.to_s}: #{e.to_s}") logger.error(e) end else deleted_tickets << ticket end } @tickets[evtype] -= deleted_tickets end |
#remove_observer(ticket) ⇒ Object
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# File 'lib/isono/event_observable.rb', line 71 def remove_observer(ticket) @handlers.delete(ticket) end |